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Apparatus and method for superplastic forming

A superplastic molding and equipment technology, applied in the field of manufacturing, can solve problems such as difficulty in accurately knowing back pressure, wasting energy and time, and reducing yield strength, saving energy and time, increasing molding speed, and high output.

Active Publication Date: 2015-09-30
北京超塑新技术有限公司
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  • Application Information

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Problems solved by technology

Complicated parts with different structures can be formed by using the extra-strong plasticity (elongation δ>100%) obtained by superplastic alloys under specific metal structure, forming temperature and deformation rate, but the existing superplastic forming technology has a major shortcoming , that is, holes will be produced during the superplastic forming process, and the generation of holes will produce two results: the first one will lead to the reduction of the physical properties of the formed parts such as tensile strength, yield strength, etc.; the second may be It will cause the formed parts to be prematurely broken due to the interconnection of holes, etc.
In addition, the molding speed is slow and the output is low
The existing main solution is to adjust the back pressure, but the adjustment is often based on empirical estimation. It is difficult to know exactly how much back pressure should be applied. The human error is relatively large. Experienced people may be able to adjust it. If not, it is a subjective guess. , the effect is not good, or waste energy and time

Method used

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  • Apparatus and method for superplastic forming
  • Apparatus and method for superplastic forming

Examples

Experimental program
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Embodiment 1

[0045] Described below, according to figure 2 Design the forming mold, use the ultrasonic detector as the detection device, use the aluminum alloy plate as the raw material, and adopt the superplastic inflation technology to prepare the forming process of the box-shaped forming part.

[0046] At the beginning, the positive pressure (upper pressure) is 1.2MPa, and the negative pressure (lower pressure) is 0.2MPa. While forming, the ultrasonic detector is used to detect the sound waves formed by the holes. When the hole formation speed increases by 10%, the back pressure will increase. 0.5MPa, when the hole formation speed drops by 9.09% (falling back to the level before the 10% rise), the back pressure is reduced by 0.5MPa to speed up the molding speed, and the whole process is repeated until the workpiece is completely molded.

[0047] Results: This process can effectively suppress holes, the holes of box-shaped formed parts are reduced by more than 50%, and the physical prop...

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Abstract

The invention provides equipment and a method for super-plastic molding. The equipment for the super-plastic molding comprises a molding device and a detection device, wherein the molding device is used for molding; the detection device is connected with the molding device and is used for carrying out real-time detection on a forming speed of a hole in a molding process; and the detection device comprises a sound wave detector. The equipment for the super-plastic molding disclosed by the invention not only can finish a molding process, but can also carry out real-time detection on the forming speed of the hole in the molding process and carry out real-time adjustment on back pressure in the molding process, so that a hole problem in the prior art is effectively solved. Furthermore, the equipment for the super-plastic molding disclosed by the invention has the advantages of fast molding speed, high yield, simple structure, convenience for operation, wide applicable range, product diversification, low cost and the like.

Description

technical field [0001] The invention relates to the field of manufacturing technology, in particular to a device and method for superplastic forming. Background technique [0002] As early as the 1960s, superplastic technology has become popular in Western countries such as Britain and the United States, and has received a lot of attention and research from scholars. Complicated parts with different structures can be formed by using the extra-strong plasticity (elongation δ>100%) obtained by superplastic alloys under specific metal structure, forming temperature and deformation rate, but the existing superplastic forming technology has a major shortcoming , that is, holes will be produced during the superplastic forming process, and the generation of holes will produce two results: the first one will lead to the reduction of the physical properties of the formed parts such as tensile strength, yield strength, etc.; the second may be It will lead to premature rupture of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D31/00B21D37/10B21C51/00
Inventor 谢业辉陈建伟孙瑞涛
Owner 北京超塑新技术有限公司
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